Is the EPI black stiffer or weaker than the stock spring? How does it differ from the stock spring when riding? thanks

 

I would assume it is stronger, you could do a search for EPI on this forum and see how it has been discussed.

If you are going to do it youself, BE CAREFUL! Look at Nyroc's website for the how-to.

 

I use a secondary clutch compresser that a buddy made me. He coppied the design from a unit made for use on snowmobile clutches. It is very quick and easy to use. It's a litle big for the kawi clutch but it works.

 

Trbolvr: The black spring is longer and stiffer. It will give you better back shift on hills but will reduce your top speed a little. This spring is great for the P650 if you have larger tires. I am curius as to why you want to change to this spring? ........MJSTX